EP0446476B1 - Piston de déroulage pour le soufflet roulant d'un ressort pneumatique à soufflet roulant - Google Patents

Piston de déroulage pour le soufflet roulant d'un ressort pneumatique à soufflet roulant Download PDF

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Publication number
EP0446476B1
EP0446476B1 EP90125253A EP90125253A EP0446476B1 EP 0446476 B1 EP0446476 B1 EP 0446476B1 EP 90125253 A EP90125253 A EP 90125253A EP 90125253 A EP90125253 A EP 90125253A EP 0446476 B1 EP0446476 B1 EP 0446476B1
Authority
EP
European Patent Office
Prior art keywords
piston
roller
wall
rolling
roller piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90125253A
Other languages
German (de)
English (en)
Other versions
EP0446476A1 (fr
Inventor
Eckhard Dr. Schneider
Hubertus Gawinski
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental AG
Original Assignee
Continental AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental AG filed Critical Continental AG
Publication of EP0446476A1 publication Critical patent/EP0446476A1/fr
Application granted granted Critical
Publication of EP0446476B1 publication Critical patent/EP0446476B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
    • F16F9/04—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
    • F16F9/05—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall the flexible wall being of the rolling diaphragm type
    • F16F9/057—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall the flexible wall being of the rolling diaphragm type characterised by the piston
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
    • B60G2202/10—Type of spring
    • B60G2202/15—Fluid spring
    • B60G2202/152—Pneumatic spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/126—Mounting of pneumatic springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/40—Constructional features of dampers and/or springs
    • B60G2206/42—Springs
    • B60G2206/424—Plunger or top retainer construction for bellows or rolling lobe type air springs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/70—Materials used in suspensions
    • B60G2206/71—Light weight materials
    • B60G2206/7101—Fiber-reinforced plastics [FRP]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
    • B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
    • B60G2206/70—Materials used in suspensions
    • B60G2206/71—Light weight materials
    • B60G2206/7104—Thermoplastics

Definitions

  • the invention relates to a cup-shaped rolling piston for a bellows air spring, on the outer wall of which a rolling fold of a bellows of the bellows air spring is supported during compression.
  • Roll-off pistons are used in bellows air springs.
  • Bellows air springs are known in a variety of forms and have e.g. Proven to a large extent as vehicle suspensions, in particular for cushioning the wheel axles of trucks and buses.
  • the bellows are attached at least at one end to a rolling piston, which is usually made of metal or plastic. In the operating state, the rolling piston moves within the rolling bellows, which is turned inside out and forms a rolling fold that rolls over the outer jacket of the rolling piston.
  • the rolling piston contributes to the total weight of the bellows air spring. Previous efforts to reduce the weight of the bellows air spring have resulted in the use of lighter piston materials and various design solutions.
  • the roller fold When compressed, the roller fold exerts a large radial force on the rolling piston, which can lead to breakage if the wall thickness is too thin. It has therefore already been proposed to provide the jacket wall with inner reinforcing ribs.
  • the rolling piston then gets its static and dynamic strength from the piston wall thickness, the reinforcing ribs and, in some versions, from a central support body.
  • a rolling piston made of metal, rubber or plastic is known, the outer contour of which continuously increases in diameter towards the foot area.
  • Horizontal, independently pressurizable chambers are provided in the rolling piston. By different pressurization of these chambers, the effective area of the bellows air spring can be adapted to different operating conditions.
  • the invention has for its object to provide a rolling piston with high strength and light weight.
  • a rolling piston for a movable diaphragm of an air spring which has parallel longitudinal walls which are connected to one another via rounded walls on the narrow sides.
  • the longitudinal walls have outer grooves that are to accommodate the excess material of the membrane. This is to prevent wrinkles.
  • An increase in the stability of the rolling piston is not sought and is not achieved.
  • a further advantageous embodiment of the invention is disclosed in the characterizing part of claim 3.
  • the continuous reinforcing ribs enable the beads to be deeper in these areas. This leads to further material savings.
  • mounting holes are arranged in the bottom of the reinforcing ribs.
  • the rolling piston is so easy on its foot area z. B. attachable to a resilient vehicle part.
  • a further advantageous embodiment of the invention is disclosed in the characterizing part of claim 5.
  • the tensile and compressive loads in the bead base are absorbed by the axially aligned fibers.
  • the interior of the rolling piston can be used as an additional air space of the bellows air spring.
  • the outer contour of the rolling piston continuously expands towards its foot region.
  • an effective area of the air spring changes depending on the deflection behavior to adjust.
  • other external contours can also be used in order to achieve certain desired spring characteristics.
  • the stiffness of the rolling piston is increased by the beads. With a small wall thickness, high loads on the rolling fold and all load peaks occurring in dynamic operation can be absorbed by the rolling piston according to the invention.
  • the outer contour of the rolling piston shown corresponds to a truncated cone.
  • the outer wall 11 of the rolling piston is provided on the outside with beads 17, 19 which extend axially from the head region 13 to the foot region 15.
  • the beads 17, 19 are distributed over the circumference at an angle of 45 o to each other.
  • Two diametrically opposite beads 19 have a greater depth than the other beads 17.
  • two reinforcing ribs 21 (FIG. 2 and FIG. 4) extending radially inward from the jacket wall extend axially from the head region 13 in the interior of the rolling piston to foot area 15 through.
  • mounting holes 23 are made, via which the rolling piston on a vehicle part, for. B. an air spring support arm can be attached.
  • the beads 17, 19 run closed in the foot region 15 to the outside up to the maximum diameter of the rolling piston.
  • the cup-shaped rolling piston has a trough-shaped bottom 25 which extends radially inwards and which has a central bore 27 for receiving a fastening bolt (not shown here), which is vulcanized onto the bottom of the bellows, for the non-positive connection of the bellows air spring to the rolling piston serves.
  • the rolling fold of the rolling bellows moves up and down on the casing wall 11 of the rolling piston.
  • the beads increase the bending moments of the jacket wall.
  • the beads also increase the buckling stiffness of the rolling piston.
  • the large shape and kink stability is achieved through the beaded, open outer contour of the rolling piston.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Damping Devices (AREA)
  • Vehicle Body Suspensions (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Claims (7)

  1. Piston de rebroussement en forme de boisseau, destiné à un ressort pneumatique à soufflet se rebroussant et contre la paroi de l'enveloppe duquel un pli de rebroussement d'un soufflet se rebroussant du ressort pneumatique à soufflet se rebroussant prend appui lors d'une compression, caractérisé en ce que la paroi de l'enveloppe comporte des moulures qui sont orientées essentiellement dans la direction de la longueur du piston de rebroussement, les moulures (17, 19) aboutissant dans la région du pied (15) du piston de rebroussement en étant fermés dans la paroi de l'enveloppe (11).
  2. Piston de rebroussement selon la revendication 1, caractérisé en ce que la sortie des moulures (17, 19) aboutissant dans la région du pied (15) atteint le diamètre maximal du piston de rebroussement.
  3. Piston de rebroussement selon l'une des revendications 1 et 2, caractérisé en ce que la paroi de l'enveloppe (11) comporte des nervures intérieures continues de raidissement (21) dans la région desquelles les moulures (19) sont plus profondes que les moulures (17) des autres régions de la paroi de l'enveloppe (11).
  4. Piston de rebroussement selon la revendication 3, caractérisé en ce que des trous de fixation (23) sont placés dans le fond des nervures de raidissement (21).
  5. Piston de rebroussement selon l'une des revendications 1 à 4, caractérisé en ce que le piston de rebroussement est en matière plastique armée de fibres et dans laquelle les fibres sont orientées en majeure partie dans la direction de l'axe de la paroi de l'enveloppe (11).
  6. Piston de rebroussement selon l'une des revendications 1 à 5, caractérisé en ce que le piston de rebroussement est fermé de manière étanche dans la région du pied (15) par une plaque de fond.
  7. Piston de rebroussement selon l'une des revendications 1 à 6, caractérisé en ce que le contour extérieur du piston de rebroussement s'élargit progressivement vers la région du pied (15).
EP90125253A 1990-03-15 1990-12-21 Piston de déroulage pour le soufflet roulant d'un ressort pneumatique à soufflet roulant Expired - Lifetime EP0446476B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4008187 1990-03-15
DE4008187A DE4008187A1 (de) 1990-03-15 1990-03-15 Abrollkolben fuer den rollbalg einer rollbalg-luftfeder

Publications (2)

Publication Number Publication Date
EP0446476A1 EP0446476A1 (fr) 1991-09-18
EP0446476B1 true EP0446476B1 (fr) 1994-06-29

Family

ID=6402205

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90125253A Expired - Lifetime EP0446476B1 (fr) 1990-03-15 1990-12-21 Piston de déroulage pour le soufflet roulant d'un ressort pneumatique à soufflet roulant

Country Status (5)

Country Link
US (1) US5180146A (fr)
EP (1) EP0446476B1 (fr)
JP (1) JPH04211740A (fr)
AT (1) ATE108005T1 (fr)
DE (2) DE4008187A1 (fr)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5437436A (en) * 1993-08-20 1995-08-01 Ni-Tech, Inc. Stand-alone gas spring
US5535994A (en) * 1993-11-30 1996-07-16 The Goodyear Tire & Rubber Company Composite air spring piston
DE19710849B4 (de) * 1997-03-15 2009-04-09 Bpw Bergische Achsen Kg Luftfeder für Luftfederachsen
EP0942193A3 (fr) * 1998-03-11 2000-06-07 BRIDGESTONE/FIRESTONE, Inc. Vérin pneumatique à cannelures
DE19910196A1 (de) * 1999-03-09 2000-09-14 Contitech Luftfedersyst Gmbh Dreh- und/oder Hubvorrichtung
HU224800B1 (en) * 1999-07-07 2006-02-28 Freudenberg Carl Kg Pneumatic spring system
DE10004122C2 (de) * 2000-01-31 2002-10-31 Zf Sachs Ag Luftfeder mit einem Rollbalg
DE10224287B4 (de) * 2001-06-15 2006-07-13 Vibracoustic Gmbh & Co. Kg Luftfederanordnung
DE102004015602B4 (de) * 2004-03-30 2011-08-18 Continental Teves AG & Co. OHG, 60488 Luftfedereinrichtung
DE102004023561A1 (de) * 2004-05-13 2005-12-08 Vibracoustic Gmbh & Co. Kg Luftfederanordnung
DE102004030335A1 (de) * 2004-06-23 2006-01-19 Contitech Luftfedersysteme Gmbh Luftfeder mit einem Abrollkolben und einem Rollbalg mit mindestens einem anvulkanisierten Befestigungsteil
ITMI20050211A1 (it) * 2005-02-14 2006-08-15 Stuani S P A Pistone perfezionato per molle ad aria applicabile a sospensioni di autoveicoli rimorchi semirimorchi
US7500659B2 (en) * 2005-04-07 2009-03-10 Bfs Diversified Products, Llc Air spring assembly and method
US8186657B2 (en) 2007-09-06 2012-05-29 Firestone Industrial Products Company, Llc Air spring modular piston
US20090200717A1 (en) * 2008-02-08 2009-08-13 Veyance Technologies, Inc. Air spring piston
CN102187113B (zh) * 2008-10-31 2013-05-15 株式会社F.泰克 螺旋弹簧用防振阻尼器
EP2488770B1 (fr) * 2009-10-14 2022-12-14 Firestone Industrial Products Company, LLC Élément d'extrémité, ensemble ressort à gaz et procédé
DE112012002716T5 (de) * 2011-06-30 2014-03-27 Firestone Industrial Products Co. Llc Gasfederendteil sowie dasselbe beinhaltende Gasfederanordnung
DE102015108519B3 (de) * 2015-05-29 2016-07-28 Saf-Holland Gmbh Stützeinheit
DE102018216989A1 (de) * 2017-10-04 2019-04-04 Continental Teves Ag & Co. Ohg Druckkörper für ein Druckluftsystem

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE259138C (fr) * 1912-07-11
DE1127729B (de) * 1957-02-19 1962-04-12 Phoenix Gummiwerke Ag Abrollkoerper aus Metall, Gummi oder Kunststoff fuer einen Stuelpbalg von Luftfedern, insbesondere fuer Kraftfahrzeuge
US2988353A (en) * 1957-05-09 1961-06-13 Gen Motors Corp Pneumatic spring construction
DE1285792B (de) * 1966-11-07 1968-12-19 Continental Gummi Werke Ag Luftfeder mit einem verformbare Wandungen und verstaerkte Wuelste aufweisenden Balg
CA1097380A (fr) * 1977-12-20 1981-03-10 William C. Pierce Amortisseur pneumatique
US4506910A (en) * 1982-09-21 1985-03-26 Granning Suspensions, Inc. Automotive vehicle suspension
IT1205188B (it) * 1987-06-26 1989-03-15 Pirelli Miglioramenti nelle molle ad aria
DE3824542A1 (de) * 1988-07-20 1990-01-25 Sauer Achsenfab Tauchkolbenanordnung
US5060916A (en) * 1988-07-20 1991-10-29 Otto Sauer Achsenfabrik Keilberg Plunger piston system

Also Published As

Publication number Publication date
JPH04211740A (ja) 1992-08-03
EP0446476A1 (fr) 1991-09-18
US5180146A (en) 1993-01-19
DE4008187A1 (de) 1991-09-19
ATE108005T1 (de) 1994-07-15
DE59006314D1 (de) 1994-08-04

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